Add support for rounding dates in DateField
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Key: SOLR-741
URL: https://issues.apache.org/jira/browse/SOLR-741
Project: Solr
Issue Type: Improvement
Components: search
Affects Versions: 1.4
Reporter: Shalin Shekhar Mangar
Priority: Minor
Fix For: 1.4
As discussed at http://www.nabble.com/Rounding-date-fields-td19203108.html
Since rounding dates to a coarse value is an often recommended solution to
decrease number of unique terms, we should add support for doing this in
DateField itself. A number of syntax were proposed, some of them were:
# <fieldType name="date" class="solr.DateField"
sortMissingLast="true"omitNorms="true" roundTo="-1MINUTE" /> (Shalin)
# <fieldType name="date" class="solr.DateField" sortMissingLast="true"
omitNorms="true" round="DOWN_MINUTE" /> (Otis)
Hoss proposed more general enhancements related to arbitary pre-processing of
values prior to indexing/storing using pre-processing analyzers.
This issue aims to build a consensus on the solution to pursue and to implement
that solution inside Solr.
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